Zero Day Initiative Advisory 12-087

Zero Day Initiative Advisory 12-087 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the raac.dll module. By editing the stsz atom in the mp4 file data, an attacker could change a sample size to force a loop in raac.dll to loop too many times, causing heap corruption. This vulnerability can be leveraged to execute code under the context of the user running the application.

This vulnerability allows remote attackers to execute arbitrary code onvulnerable installations of RealNetworks RealPlayer. User interaction isrequired to exploit this vulnerability in that the target must visit amalicious page or open a malicious file.

The specific flaw exists within the raac.dll module. By editing the stszatom in the mp4 file data, an attacker could change a sample size to forcea loop in raac.dll to loop too many times, causing heap corruption. Thisvulnerability can be leveraged to execute code under the context of theuser running the application.

- -- Vendor Response:

RealNetworks has issued an update to correct this vulnerability. Moredetails can be found at:

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Researchers interested in getting paid for their security researchthrough the ZDI can find more information and sign-up at:

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The ZDI is unique in how the acquired vulnerability information isused. TippingPoint does not re-sell the vulnerability details or anyexploit code. Instead, upon notifying the affected product vendor,TippingPoint provides its customers with zero day protection throughits intrusion prevention technology. Explicit details regarding thespecifics of the vulnerability are not exposed to any parties untilan official vendor patch is publicly available. Furthermore, with thealtruistic aim of helping to secure a broader user base, TippingPointprovides this vulnerability information confidentially to securityvendors (including competitors) who have a vulnerability protection ormitigation product.